6684858720 has 240 divisors, whose sum is σ = 23830229808. Its totient is φ = 1764633600.

The previous prime is 6684858683. The next prime is 6684858731. The reversal of 6684858720 is 278584866.

6684858720 is a `hidden beast` number, since 6 + 68 + 485 + 87 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×6684858720² = 89374672212720076800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1306407 + ... + 1311513.

Almost surely, 2^6684858720 is an apocalyptic number.

6684858720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6684858720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11915114904).

6684858720 is an abundant number, since it is smaller than the sum of its proper divisors (17145371088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6684858720 is a wasteful number, since it uses less digits than its factorization.

6684858720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5235 (or 5218 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 54.

The square root of 6684858720 is about 81760.9853169591. The cubic root of 6684858720 is about 1883.7824406979.

The spelling of 6684858720 in words is "six billion, six hundred eighty-four million, eight hundred fifty-eight thousand, seven hundred twenty".